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So, after reading quite a few posts seems I am not the only one to have a stuck piston on the back brake meaning one pad is always in contact.
Tried pushing the pistons in and out with a couple of drops of brake oil on, but it is still sticking. Going to disassembe and regrease pistons before trying buying new pistons. So I have 2 stupid questions:
1) I have a manual that someone linked to which is great - however, do i need to disconnect the hose - if so a) how and b) anything I need warning about
2) greasing the pistons - eveyone talks of this read grease stuff - is this the same as the pinky red grease with teflon in you can buy like TF2 which seems to be mineral oil based
cheers:)
You will need to disconnect the hose, but try to pump the pistons out almost to the point of popping first, it'll make it easier to remove them.Undo the hose just a little using an 8mm spanner, and loosen the bolts holding the caliper together before removing it from the bike as it's also easier than trying to do it in your hand.A toothbrush is useful for getting into the seal groove when cleaning them, and don't use TF2 grease, it will destroy your seals, silicone grease/oil from a plumbers supplier will do the job nicely.
ok great thanks, i have actually just aquired some of the red rubber grease so will use that. just a couple more questions!
-i take it when i remove the hose there is no shut off so all the liquid will come out?
-the caps that go on the levers, that can be unscrewed - both of mine corroded all round the screw - obviously fluid leaked out. the shop sent me new ones to install - i put one on today before i tried bleeding them - when i came back later some fluid had welled up - is this normal, like a fail point on the brakes?
also i guess i may as well get some new pistons as i imagine the old one is shot?
cheers
Andy